Floor-surfacing machine



June 16, 1925. 1,542,667

A'. B. CHRISTENSEN ET AL FLOOR SURFACING MACHINE 7 Filed Oct. 27- 19 4 2Sheets-Sheet 1 INVENTORS ATTORNEY June 16, 1925 1 1,542,667 A. B.CHRISTENSEN ET AL FLOOR SURFACING MACHINE Filed Oct. 27- 1924 2Sheets-Sheet 2 NNNNNN O R Patented June 16, 1925.

UNITED STATES 1,542,667 PATENT OFFICE.

AXEL B. cn'msrnnsnn AND ANDREAS IB. ANDREASS'EN, or PORT WASHINGTON, NEWYORK.

FLOOR-SURFACING E.

Application filed October 27, 1924. Serial No. 746,127.

To all whom it may concern:

Be it known that we, AxnL B. CHRISTEN- SEN and ANDREAS B. ANDREAssnN,citizens of the United States, residing at Port Washington, in thecounty of Nassau and State of New York, have invented new and usefulImprovements in Floor-Surfacing Machines, of which the following is aspecification.

This invention relates to improvements in floor surfacin machines and tothat type adapted for finishing hard and soft wood floors, as well asstone, marble and the like.

The primary object of this invention is to provide a floor surfacingmachine that will not only adequately sand paper floors but one that canbe converted into a polishing machine for the purpose of polishing thefloors after the sand papering process has been completed.

A further object is to provide a floor surfacing machine that iscapableof operating upon that portion of floors that are arrangedadjacent base boards, walls and the like, .as well as in corners andother difiicult places to get to that ordinarily have to be finished byhand.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is a side elevationof the machine forming the subject matter of thepresent invention.

Figure 2-is a top plan view thereof.

- Figure 3 is a longitudinal sectional view taken through the machine.

Figure 4 is a sectional view taken on line H of Figure 1.

Figure 5 is an enlarged sectional view taken through a fragmentaryportion of the sand paper belt shown applied to the machine in Figure 3.

. Referring to the drawings in detail a supporting platform is indicatedby the reference numeral 1 and depending from said platform areapertured ears 2 for receiving axles 3 to which are rotatably mountedsupporting wheels 4 whereby the machine can be conveniently moved.Arranged upon one end of the platform there is an electric motor 5 whichsupplies power for the machine. The motor is of the conventional typeand fixed to the drive shaft thereof is a sprocket wheel 6. Brackets 7rise from adjacent the opposite end of the platform and have their upperends formed with bearlngs 8 to receive a shaft 9 which have securedintermediate its ends a sprocket wheel 10. An endless chain 11 istrained over the sprocket wheels 6 and 10 to transmlt power from themotor to the shaft 9. Disk wheels 12 and'13 are keyed to the shaft 9 andbeing arranged at each end thereof as shown and secured to each of thedisk wheels are ecoentrically mounted wheels 14 and 15 respectivelywhich are spaced from the disk wheels by spaced bearings 16 fixed uponbolts 17 passing through the disk wheels and being provided with nuts 18for retaining the respective wheels secured together in operativeposition. The eccentrically mounted wheels 14 and 15 extendsubstantially in an opposite direction from their securing points, andthis is done with a view of causing the desired operation of a portionof the machine which will be presently described.

The polishing and sanding unit which is associated with the aboveassociated elements includes a block 19 to which is secured side plates20. The side plates 20 have their rear ends extended beyond the rear endof the block and terminate in diverging arms 21 and 22 provided withopenings formed in their outer ends. The arms 21 rise at a rearwardinclination from the side plates and are pivotally secured adjacent theends of a shaft 23 which passes through and has keyed thereto a roller24. Secured to the ends of the shaft 23 are disk wheels 25 and 26 whichpivotall receive one end of connecting rods 27 an 28 while the oppositeends of these rods are pivotally secured adjacent the edge of theecoentrically mounted wheels 14 and 15 as clearly shown in Figure 2 ofthe drawings. The arms 22 incline downwardly from the side plates andpivotally receive one end of connecting rods 29 and 30, and the oppositeends of these last mentioned connecting rods are secured to the bolts 17between the spaced bearings 16 as shown in Figure 4 of the drawings.

From the above description and the drawings, it will be'readily apparentthat the polishing and sanding unit is mountedfor reciprocatorymovement. The side plates 20 extend beyond the blocks 19 and brldglngthe extenslons at appropriate places thereon are shafts 39 two of whichare disposed adjacent the front of the block and the remaining one atthe lower rear end thereof. The block is provided with transverselydlsposed semi-circular cross sectional grooves to accommodate rollers 32which are mounted upon the shafts 31 as shown.

Trained over the rollers 32 and 24 respectively is an endless belt 33which is provided with a reinforcing roller-engag ng portion 34 and anouter portion 35 whlch is in the form of sand paper. The roller 24 beingrotated by power derived through the motor will cause the belt 33 torevolve as will be readily apparent.

It should be noted that the under surface of the block 19 is flat andthe portion of the belt which extends across this surface will engagethe fioor for operation thereon. Of course a polishing belt may besubstituted for the sand belt, not shown, without deviating from thespirit of the invention.

As above stated the block is given a reciprocatory movement and by thebelt revolving thereon it will be obvious that a floor can be preparedas desired in an expeditious manner.

A handle 40 is secured to the rear end of the platform whereby themachine can be readily moved from place to place during the process offinishing the floor or conveniently moved to predetermined localities.

It is thought from the foregoing description that the advantages andnovel features of our invention will be readily apparent.

We desire it to be understood that we may make changes in theconstruction. and

in the combination and arrangement of the several arts, provided thatsuch chan es fall wit in the scope of the appen ed claims.

What we claim is:

1. A machine of the character described comprising a wheel platform, apair of spaced brackets risin from the platform, bearings formed on t eupper ends of said brackets, a shaft journaled in the brackets, a diskwheel keyed to each end of said shaft, an eccentrically mounted wheelsecured to each of the dlsk wheels and extending therefrom insubstantially opposite di-' rections, a floor surfacing unit arranged inadvance of the platform, and connecting rods securing said floorsurfacin unit to the eccentrically mounted wheels 1n a manner wherebythe floor surfacing unit will be caused to reciprocate upon rotation ofthe eccentrically mounted wheels.

2. A machine of the character described comprising a wheel platform,rotatably mounted disk wheels arranged on said platform, eccentricallymounted wheels secured to the disk wheels, a bolt forming the securingmeans, spaced bearings surrounding the bolts and spacing the wheels, aconnecting rod having one end fixed to the bolt between the bearings, asurfacing block, side plates secured thereto, and extending beyond therear end thereof, diverging arms formed on the side plates and some ofthese arms pivotally receiving the opposite ends of the connecting rods,a shaft journaled in the remaining arms, disk wheels keyed to the endsof the shaft, connecting rods having their ends fixed to theeccentrically mounted wheels and last mentioned disk wheelsrespectively, a roller keyed to the shaft, and an endless belt trainedaround said roller and surfacing block respectively as and for thepurpose specified.

In testimony whereof we afiix our signaures.

AXEL B. CHRISTENSEN. ANDREAS B. ANDREASSEN.

